Bericht Nr. 43 IGKB

INHALTSVERZEICHNIS
A – A K T U E L L E R T E I L ................................................................................. 10
Schnelle Ausbreitung der Quagga-Muschel im Bodensee .......................................................... 11
Anthropogene Spurenstoffe im Bodensee und seinen Zuflüssen .............................................. 14
Untersuchung im Freiwasser und in den Zuflüssen 2019 ............................................................. 14
I. Bodensee Freiwasser ................................................................................................................. 14
II. Bodensee Zuflüsse .................................................................................................................... 17
III. Fazit Freiwasser und Zuflüsse ................................................................................................. 18
B – J A H R E S B E R I C H T .................................................................................. 22
E i n l e i t u n g ................................................................................................................................... 23
Z u s t a n d s b e s c h r e i b u n g 2 0 1 8 ......................................................................................... 24
B o d e n s e e - O b e r s e e ............................................................................................................ 24
B o d e n s e e - U n t e r s e e .......................................................................................................... 32
Fazit und Handlungsbedarf ........................................................................................................... 36
Z u s t a n d s b e s c h r e i b u n g 2 0 1 9 ......................................................................................... 37
B o d e n s e e - O b e r s e e ............................................................................................................ 37
B o d e n s e e - U n t e r s e e .......................................................................................................... 47
Fazit und Handlungsbedarf ........................................................................................................... 51
U n t e r s u c h u n g s p r o g r a m m F r e i w a s s e r .................................................................... 52
Meteorologie .................................................................................................................................. 54
Hydrologie ..................................................................................................................................... 56
Windverteilung ............................................................................................................................... 58
Wassertemperaturen an der Oberfläche und über Grund............................................................. 60
Wärmeinhalt .................................................................................................................................. 62
Wassertemperatur ......................................................................................................................... 63
Langzeitentwicklung von Sauerstoff, Gesamtphosphor, Ammonium und Nitrat ........................... 66
Sauerstoff ...................................................................................................................................... 67
Gesamtphosphor ........................................................................................................................... 69
Orthophosphat ............................................................................................................................... 71
Nitrat .............................................................................................................................................. 73
Ammonium .................................................................................................................................... 74
Silikat ............................................................................................................................................. 75
Chlorid ........................................................................................................................................... 76
Mangan .......................................................................................................................................... 77
Eisen .............................................................................................................................................. 78
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